Automatic smokeless furnace.



Patented Oct. H5, i900; I F. WILD.

RUTOWIATIC SMOKELESS FURNACE.

(Application filed Mar. 31. 1899.:

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fica/ W0. 660,085. Pakented 06!. IB, I909. F. WILD. AUTOMATIC SMOKELESSFURNACE. [Apphcalxon filed Mm- 31, 1899) (No Model.)

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No. 660,035. Patented Dot. N3, I900. F. WILD.

AU TOM ATI-C SWWKELESS FURNACE.

m iiwuon filed Mm. a1, 1899.

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AUTOMATlC SMOKELESS FURNACE.

SPECIFICATION forming part of Letters Patent No. 660,085, dated October16, 1900. Aoplication filed March 31, 1899. Serial No. 711.226. kllomodel.)

To all whom, it may concern.-

Be it known that I, FRED WILD, a citizen of the United States ofAmerica, residing at Denver, in the county of Arapahoe and'State ofColorado, have invented certain new and useful Improvements in AutomaticSmokeless Furnaces; and I do declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same,reference being had to the accompanying drawings, and to the figu res ofreference marked thereon, which form a part of this specification.

My invention relates to improvements in smokeless furnaces of the classset forth in Letters Patent No. 492,175, issued to me February 21, 1893.

My presentinventiou may be considered an improvement on the constructionset forth in said patent. Hence the object sought by me in thisimprovement is substantially the same as set forth in my previous patentnamely, to provide an automatic smokeless furnace in which the chemicalequivalents never vary and in which perfect combustion may be had underall circumstances, since it adapts itself to any coal, whetheranthracite, lignite, semibituminous, fat bituminous, free burning,caking, coking, or clinkering coal.

An important feature of my improvements consists in automatic means forregulating and controlling the supply of air and steam to the fire-box.By reason of these automatic devices the only attention the furnaceneeds is to keep it supplied with fuel. The door which closes theopening through which the fuel must pass to the fire-box is connectedwith these automatic devices in such a manner that the opening of thedoor actuates the automatic mechanism which governs the supply of airand steam to the fire-box, whereby these elements are delivered in suchproportions as to result in perfect combustion, no matter what the kindor quality of coal and regardless of atmospheric changes and varyingclimatic conditions.

The invention will now be described in detail, reference being made tothe accompanying drawings, in which is illustrated an embodimentthereof.

In the drawings, Figure 1 is a longitudinal section taken throughmyimprovcd furnace. Fig. 2 is an inside view of the front of thefurnace. Fig. 3 is an outside view of the same. Fig. 1 is a horizontalsection taken on the line X X, Fig. 2. Fig. 5 is a similar section takenon the line Y Y, Fig. 2. Fig. (3 is a fragmentary section taken thro ughthe front part of the furnace, illustrating the automatic mechanism forcontrolling the supply of air and steam to the fire-box. Fig. 7 is asection taken through the water-cylinder. Fig. 8 is a detail view inperspective illustrating the damper located between the ash-pit and theair-chamber. Fig. 9 is a section taken on the line Y Y, Fig. 4:. Fig. 10is a section taken on the line Z Z, Fig. 9.

Similar reference characters indicating corresponding parts in theseviews, let the numera] 5 designate the outer walls of the furnaceinclosing the fire-box 6, provided with the grate 7, one extremity ofwhich rests upon the bridge-wall 8. In front of the firebox andsurrounding the fuel-openings 9 on three sides is an air-chamber 10,whose inner walls adjacent the fire-box and surrounding the openings 9are perforated, as shown at 10 and 10. Between this air-chamber 10 andthe ash-pit 12 are located three dampers 13, supported by a common hingepin or shaft 14:, which is journaled in the furnace. These dampers arearranged to open and close in unison. Each of the dampers is connectedwith a crankarm 15, fast on a rock shaft 16, by a link 17, pivotallyconnected with a dam per at one extremity and with the crankarm at theopposite extremity. The dampers are opened and closed by the operationof the shaft 16 through the instrumentality of the automatic mechanismconnected with one of the furnace-doors, as hereinafter ex plained.

In the upper part of the air-chamber 13 is located a horizontalsteam-pipe 18, provided with branches 18 having rearward extensions 18whose free open extremities are located directly opposite fun nel-shapedmouths 19, surrounding the openings in the rear wall of the air-chamberand projectinginto the firebox or combustion-chan1ber. These months 19may be termed blowers, since the steam is forced through them into .thecombustionchamber. The horizontal pipe 18 is connected with a pipe 20,leading from the boiler or other source of steam-su pply. To the frontof the furnace are hinged two doors 21 and 21, adapted to close thefuel-openings 9, leading to the fire-box. The door 21 is connected by alink 22 with a crank-arm 23, connected with a three-way valve 24, whosechamber communicates with threepipes 25, 26, and 27. The pipe 25 leadsfrom a suitable water-supply source. waste-conduit, and the pipe 26leads to the bottom of a cylinder 28, in which is located a piston 29,attached to one extremity of a rod" When the door 21 is closed, as shownin;

30. Fig. 2, the position of the valve 24 is such that the water from thepipe 25 cannot flow; through the valve-chamber; but the chain-iher-passage connecting the pipes 26 and 27 is When, however, the door 21is cylinder, the water enters, the cylinder and, raises the piston andturns a rock-shaft 31,

which is provided with a crank-arm 32, con- The turning nected with thepiston-rod 30. of the shaft 31 opens the dampers 13 through the instrumentality of a crank 33 on the shaft,

a crank 34, attached to the rock-shaft 16, and At the same time a valve36 in the steam-pipe 20 is.

a rod 35, connecting the two cranks.

opened through the instrumentality of a crank 37 011 the shaft 31, acrank 38, connected with the valve 36, and a rod 39, connecting the twocranks.

to the fire-box commensurate with the increased demand for theseelements incident the extreme annoyance of this smoke, which is onlyunburned combustible fuel elements. As soon as the door 21 is closed thevalve 24:

is moved sufficiently to cut off communication between the pipes 25 and26 and to open.

communication between the pipe 26 and the waste-pipe 27, through whichthe water in the cylinder will escape more or less slowly, as

desired,since the passage of the water through, the waste-pipe may becontrolled at will byj means of a valve or by regulating the size of thepipe. As the water escapes from the cylinder 28 the piston 29 will movedownwardly.

by gravity and turn the rock-shaft 31, Whereby the valve 36 and thedampers 13 are gradually closed through the medium of the connectionsheretofore described. Hence it will I be readily understood that thesupply of air.

and steam to the furnace may be continued as (Not shown.) The pipe 27 isa1 The dampers 13 and the steam-f pipe valve 36 beingopened, a supplyofsteam and an increased volume of air are admitted long as may berequired by virtue of my a utoma tic mechanism. The cylinder 28, whichis preferably composed of brass, is protected by an outer casing 40.

In Fig. 1 an auxiliary boiler 45 is shown for supplying the fire-boxwith steam by way of the pipe 20 when the furnace is used for purposesother than for steam generation in the regular boiler 46, also shown inFig. 1.

The bottom wall separating each fuel-opening 9 from the ash-pit iscomposed of two parts A and B,tl1e part B being movable and adapted toslide on the part A, leaving an opening leading to the ash-pit, throughwhich clinkers or other material raked from the grate may pass to theash-pit.

Having thus described my invention, what I claim is V 1. A furnaceprovided with an air-chamber located in front of the fire-box and havinga perforated rear wall adjacent the fire-box and perforated wallssurrounding the fuel-openings on three sides, and openings in the bottomof the air-chamber communicating with the ash-pit, in combination withdampers for controlling said openings.

2. A furnace provided with an air-chamber located in front of thefire-box and having a perforated rear wall adjacent the fire-box andperforated walls adjacent the fuel-openings, and openings in the bottomof the air-chamber communicating with the ash-pit, in combination withdampers controlling said openings, a door adapted to close one of thefuelopenings, and means operated from said door for automaticallycontrolling said dampers.

3. A furnace provided with an air-chamber located in front of thefire-box and having perforated walls adjacent the fire box and thefuel-opening, and a damper controlling an opening formed in the bottomof the airchamber, in combination with a steam-pipe located in the saidair-chamber and having branches directed toward openings formed in therear wall of the air-chamber adjacent the fire-box.

4. A furnace provided with an air-chamber located in front of thefirebox and having perforated walls adjacent the fire-box and thefuel-opening, and a damper-controlled open ing formed in the bottom ofthe air-chamber, in combination with a steam-pipe located in the saidair-chamber and'having branches directed toward openings formed in therear wall of the air-chamber adjacent the fire-box, said openings beingsurrounded by funnel-shaped mouths.

, 5. A furnace provided-with an air-chamber located in front of thefire-box and having perforated walls adjacent the fire-box and thefuel-opening, and a damper-controlled opening formed in the bottom wallthereof, in combination with a steam-pipe located in the saidair-chamber having branches directed toward openings formed in the rearwall of the airchamber adjacent the fire-box, a door controlling theopening to the fire-box, and means operated from said door forautomatically controlling the supply of steam to the fire-box throughsaid steam'pipe.

0. A furnace provided with an air-chamber located in front of thefire-box and having openings in its Wall communicating therewith and anopening in its bottom Wall communicating with the ash-pit, incombination with a hinged damper controlling said opening, a dooradapted to close the fue1-opening to the fire-box, and means initiallyoperated from the said door for controlling said damper, said meanscomprising a Water-cylinder, a piston located therein and provided witha suitable rod, a rock-shaft having a crank connected with saidpiston-rod, another rock-shaft con- FRED WILD.

Witnesses:

A. J. OBRIEN, NELLIE G. DANIELS.

